The AV column gives the item's raid power, which is Attack + (Defense/4). Multiplying this number by 4 gives the actual average damage that item would give you in a raid on a 1 stam/honor hit. Note that AV does not figure in additional damage given from abilities.

Delphine Doom: Chance for bonus damage against Aquatic raids; Extra damage if you own Mrrrggll; Extra damage if you own Princess Lysicaa; Chance to increase critical hit damage when you score a critical hit against an Aquatic raid

Sublime Violence: Chance for bonus damage; Extra damage for each piece of Enlightened Golden Garden Set equipped; Extra damage for each unique piece of Golden Garden Set; Extra damage for each unique piece of Panoptica set owned; Extra damage for each unique piece of Omniscient Angel set owned; Increase Player Perception by 5 for for each unique piece of Golden Garden, Enlightened Golden Garden, Panoptica, and Omniscient Angel set owned; Increase Player Energy by 115.

Lord of the Dead: Chance for bonus damage; Extra damage for each piece of Necro-Lord's set worn; Extra damage and 24 Energy for each unique piece of Dark Pankration set owned; Extra damage against Magical Creature raids; Extra damage against Undead raids

Skirl of the Pipes: Chance for bonus damage; Extra damage for each piece of Titaran Piper Set worn; Set(8) Extra damage against Qwiladrian raids; Increases Player's Energy and Honor by 45; Increases Player's Energy and Honor by 10 for each piece of Titaran Piper Set worn